Sammy thought she'd seen all the weirdness her town had to offer - and then she met Justice Jack, Santa Martina's very own superhero. Well, really he's just a guy in spandex and a mask who rides around town on a dirt bike, hoping to find some crime to fight.

The old folks in town think he's wonderful. So wonderful that they've asked him to track down Sammy's neighbor Mrs. Wedgewood, who seems to have disappeared - along with a lot of other people's cash. Sammy's friends think Justice Jack is funny and cool. Billy Pratt's even auditioning to be his sidekick! But Sammy thinks he's kind of . . . lame. He's more of a showstopper than a crime stopper. And when a real mystery comes along, Sammy finds herself right in the middle of it. . . .